Patients will be stimulated for 3 consecutive days with granulocyte colony stimulating factor (G-CSF) and then their bone marrow will be harvested according to their weight. Bone marrow will be processed in order to obtain CD34+ cells and minimize the amount of red blood cells. An inoculum of 5 to 10mL of stem cells will be infused intrathecally. Patients will be evaluated with two scales "CARS" and the "IDEA" also we will check the clinical history. On days 0, 30 and 180.